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Reproductive seasonality of the Florida gar, Lepisosteus platyrhincus
Orlando, E.F.; Binczik, G.A.; Guillette Jr., L.J. (2000). Reproductive seasonality of the Florida gar, Lepisosteus platyrhincus, in: Norberg, B. et al. (Ed.) Proceedings of the 6th International Symposium on the Reproductive Physiology of Fish, Bergen, Norway, July 4-9, 1999. pp. 107
In: Norberg, B. et al. (Ed.) (2000). Proceedings of the 6th International Symposium on the Reproductive Physiology of Fish, Bergen, Norway, July 4-9, 1999. Department of Fisheries and Marine Biology, University of Bergen: Bergen. ISBN 82-7461-048-2. 499 pp., more
In: International Symposium on the Reproductive Physiology of Fish. Museo Nacional de Ciencias Naturales, more

Available in Authors 
    VLIZ: Proceedings [4152]

Keyword
    Marine

Authors  Top 
  • Orlando, E.F.
  • Binczik, G.A.
  • Guillette Jr., L.J.

Abstract
    The objective of this study was to characterize the reproductive seasonality of a wild population of the Florida gar, Lepisosteus platyrhincus. We measured gonadosomatic indices (GSI); plasma estradiol (E sub(2)), testosterone (T), and vitellogenin (Vtg) concentrations; and follicle diameters in the females. In males, we measured GSI, plasma T, and seminiferous tubule areas (STA). Additionally, the reproductive stages of both sexes were determined. We observed a seasonal pattern in the reproduction in both females and males. Following a quiescent period in the summer, there was an increase in sex steroid hormones during the fall, leading to the onset of vitellogenesis or active spermatogenesis. These data indicate that the majority of females spawned during the early spring followed by a general decrease in reproductive parameters of both sexes to summer levels.

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